Lecture 8

Learning objectives

After this class, you should be able to:

1. Explain the concept of a communicator in MPI.
2. Explain how MPI matches messages.
3. Explain the semantics of MPI_Send and MPI_Recv.
4. Compile and run MPI programs.
5. Write simple MPI prorgams using MPI_Init, MPI_Comm_rank, MPI_Comm_size, MPI_Send, MPI_Recv, and MPI_Finalize.

Reading assignment

1. Lecture 8 slides.
2. Lecture 8 example codes.
3. Section 3.1.

Exercises and review questions

• Questions on current lecture's material
  1. Modify the hello_world code so that only every even numbered process prints an output.
  2. Modify the SR code so that process 0 sends data to all other processes.

• Questions on next lecture's material
  1. None.